66601706 has 8 divisors (see below), whose sum is σ = 100021440. Its totient is φ = 33261228.

The previous prime is 66601697. The next prime is 66601709. The reversal of 66601706 is 60710666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×66601706³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (66601709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17666 + ... + 21101.

It is an arithmetic number, because the mean of its divisors is an integer number (12502680).

Almost surely, 2^66601706 is an apocalyptic number.

66601706 is a deficient number, since it is larger than the sum of its proper divisors (33419734).

66601706 is a wasteful number, since it uses less digits than its factorization.

66601706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39628.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 66601706 is about 8160.9868275840. The cubic root of 66601706 is about 405.3483889392.

The spelling of 66601706 in words is "sixty-six million, six hundred one thousand, seven hundred six".